Web site design

I need a photo manipulation app for IOS and Android
General information for the app: Photo Overlay app
Kind of development: New app from scratch
Num. of web pages/modules: 6??
Description of requirements/features: Hello,
I'm looking for a brand new app that allows users to impose full size renders of celebrities and fitness athletes over photos.
As an example the app will contain photos of arnold schwarzenegger and put these images on photos of the user, allowing you to compare your height and size to him.
It would work in a similar way to a snapchat filter and also allow photos to be saved and uploaded to social media.
Extra notes: